Insulated support for inductance coils



l l 545 452 Get .11 1927 l.. STEINBERG-ER ET AL 9 9 INSULATED SUPPORT FOR INDUCTANCE COILS Filed De. 11, 1922 ah-ATTORN EY Patented Oct. 11, 1,927.

UNITED STATES PATENT OFFICE.

I .OUIs s'rEINBEReKR, or BROOKLYN, NEW' YORK, AND GUY KILL, OF'WASHING'ION, DISTRICT OE COLUMBIA, AssIGNoRs To WIR-ED RADIO, INC., OF NEW YORK, N. Y.,

A CORPORATION F DELAWARE.

i INSULATED SUPPORT FOR INDUOTANGR oOILs.

Application led December 11, 1922. l Serial No. 606,104.

. Our invention relates particularly to insulated supports for mounting inductance coils, for radio apparatus. Oneof the objects of our .invention is to so mount the conductor forming the coil that it is entirely exposed to air except at those places where it is in metallic contact with metal studs which in turn are in metallic contact with metal bushings which are secured tosupports of insulating material. y

This invention is an improvement of the construction shown in our-patent for insulated supports on induction coils No. 1,342,- 303. In the above mentioned patent, the copper conductor forming the inductance coil in practice was usually secured to the slotted metal studs by means of soldering the connector to the stud. While this method Was satisfactory with many sizes of coils, there was some dilicultyin applying itto other sizes and careful workmanship was re:

quired on the soldering so that the heat resulting from this operation did not loosen' the studs or injure the insulating material.

In the present invention the metal studs are first soldered to the copper coil and then the studs are inserted in metal bushings in the insulating material and then secured in place as hereinafter described without requiring lo any heat to be applied to the insulating material. Another advantage of the present invention is that by securing the metal studs to the coil at proper distances from each other, the coil will more readily take the $5 form of a true s iral or true helix, as the case may be, are inserted in the insulated bushing. In the construction of the coil in accordance with ourA patent mentioned above, consider- 40 able care had to be exercised in placing the coil'in the slots so that the resulting spiral or helix would have a perfectly uniform shape and the spacing between the turns be accurate at all points on the coil.

Another object is to mount the conductor in such a manner as to permit it to radiate heat to a maximum degree, thereby providing for rapid cooling of the conductor. Another object is to so mount the conductor of the inductance coil that there will be no insulating material actually between the coils by reason of the provision of insulating matewhen t e studs soldered tothe coill rial only between the metal bushings in which are secured the metal studs -to which the coils are connected, andtliereby reduce the distributed capacity of the coil.

Another object is to so construct a coil that the entire coil can be mechanically and electrically stron and the copper .ribbon forming the coil l(ve held positively in place Without requiring any soldered connections or heat to be applied with metal in contact with insulating material, and the coil to be so designed that one edge of it will be suitable for making contact with the sliding arm.

Another object is to so construct a coil mounting and coilwinding that the complete structure is mechanically strong and in which there are no metallic parts except those which are in electrical contact with the conductor forming .the coil, and that these metallic parts are so secured to the insulating material that there will be no chance for` ybrushing on these metallic parts through the insulating material.

Other ob'ects w1ll ap ear from the hereinafter specifications an claims.

Referring to the drawings,in which similar reference' characters indicate the sam parts in the several views:

Fig. 1 is a view in section consisting ofa 1 portion of a tubular support provided with' metal sockets for the reception of engaging studs. v

2 is a section on line Tf-7 of Fig. 7. Flg. 3 is a view in elevation of a copper wire or rod to which is secured contact studs of another form to engage the sockets or sleeves shown in Fig. 7.v

Fig. 4 is an elevation of a wire or rod provided with copper tubes for the reception of contact pins supported on the insulated mountlng.

Fi 5 is a sectionof an insulating tube A,

provided with contact pins similar in structure to the insshown in Fig. 9 and adapted to engage t e copper tubes of Fig. 10.

Fig. 6 is a section on lines d--d of Figs. 9 and 11.

In Figs. 1 and 5 we show a form of tubular insulating support C which may be made out of any suitable insulating material, preferably Electrose, rin which the metal bushings B are inserted into and ex- I in place.

panded or spun against the Walls of the holes or openings D in order to hold them tightly We find than a ribbon of metal, consequently, we

y provide a wire rod K into which copper pins vB2 are inserted, and which are secured in place preferably by means of solder. These pins have longitudinal slots X and -Y extending through the same at right angles to each other, the portions ofthe pins on either side of the slots being expanded preferably by inserting a ltool therein so that the expanded pin will receive atight tit in the, socket or sleeve provided for the contact.4

f In Fig. 5 we show a tube C similar to that shown, in Fig. 1 in which copper pins B2 such as shown in Fig. 3, and described ywith respect thereto, are rigidly mounted. These pins are designed to engage the copper tubes C2 which are secured to the copper Wire or rod K2, the ends of the pins being inserted in the sockets V formed in the' wire. or rod, and the copper tubes are secured to the sockets preferably by means of.

solder to cause them to be permanently held in the wire or rod. v

As above described, the copper pins are a Wirelrod preferably of copper is much more readily manipulated or handled forced into the copperltubes and make a perfeet contaetbecause of the spring action of the ends of each of the pins.

We also provide Ventilatingopenings D2 and D3 through the tubes, as clearly shown in Fig. 2. This same structure is applicable to the structure shown in Fig. 5.

Having thus described our invention what We claim as new and desire to secure by Letters Patent is:

l. A device of the type described which fitted over said studs, said studs having longitudinal slots and being tooled out about said slots to frictionally engage the inner wall of said `hollow pins.

LOUIS STEINBERGER. GUY HILL. 

